Teenage pop star Justin Bieber was left red-faced during a performance on TV on Wednesday (23Nov11) after forgetting the words to famous Christmas track Santa Claus Is Coming To Town.

The singer appeared on the Today show to promote his new festive album and he took to the stage in front of hundreds of fans in New York to sing a short set, and he closed the show with the well-known tune.

However, Bieber blanked out midway through the live performance, forgetting the lyrics and simply repeating the line "He's making a list" to fill the gaps.

The star refused to let the mistake stop the show and continued with his performance unfazed.